They refined crude oil into various petroleum products.他们将原油提炼成各种石油产品.ABout 90 % of the waxes in commerce are recovered by dewaxing petroleum.工业用蜡中约有90%是由石油中回收的.The petroleum exploration geologist working with subsurface...
A plug had been inserted in the drill hole.钻孔已塞上了塞子。Make sure the draining board, sink and plug hole are regularly disinfected.滴水板、水槽和塞孔一定要定期消毒。The banks have the power to pull the plug on the project.银行有能力让该工程终止。...